Malicious PDF — malware analysis report

Static analysis result for SHA-256 39de50370eb43fe5…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 22:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98d0de8e77510afa82a34ba46d928058 SHA-1: c10d03405dcbb44231513a6d4648e4379924d455 SHA-256: 39de50370eb43fe50d67031751606e0b22911d666455b6086ec48e3e0f1a012a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body text and heuristic firings indicate a social engineering lure, instructing the user to install a browser extension or update to view content. This is a common tactic for credential harvesting or malware delivery. No scripts were extracted, limiting further analysis of specific payload delivery mechanisms.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=twitter+video+er+firefox
    • http://sekodaju.peirsoncenter.com/uploads/1/3/0/7/130775075/botadetowejenaj.pdf
    • http://junolikew.jmccormickbennett.com/uploads/1/3/1/1/131164312/lumiludubal.pdf
    • http://files.matthiasnolte.com/uploads/1/3/1/4/131408100/4131136.pdf
    • https://cdn.shopify.com/s/files/1/0435/5522/5763/files/cuento_bestiario_de_seres_fantsticos_mexicanos.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/werevitowoxaniwavikafux.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/gaburit.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2783/files/albertine_sarrazin_l_astragale.pdf
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/english_baroque_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/tamaganatafedojej.pdf
    • https://cdn.shopify.com/s/files/1/0438/0894/8386/files/cfm56_5b_component_identification.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/56901454369.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c59.bin
cbb52481ce94e16f1aa7c1e5556943e0858c32639ae52c58d7d3596933ba349e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C59 3016 bytes
font_01_sfnt_off00006715.bin
0511a16e14e6a67aa94b16040c451402f3aae66164bb2ba3df3becc8ec73728b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6715 4652 bytes
font_02_sfnt_off0000770e.bin
12423f8c629e41f849ac97a252cc980f7704d54a404bb1ac4e2e324d9585d6d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770E 10320 bytes

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